Color Blindness Simulator
See how your colors appear to people with color vision deficiency. Simulate deuteranopia, protanopia, tritanopia, and achromatopsia — and check if your palette is distinguishable across all types.
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Original
Original
Deuteranopia
~6% of males
Protanopia
~2% of males
Tritanopia
~0.01% of people
Achromatopsia
~0.003% of people
Deuteranopia
~6% of malesMissing or non-functional M (medium-wave, green-sensitive) cones. Reds and greens are difficult to distinguish.
Most common type of color blindness
Protanopia
~2% of malesMissing or non-functional L (long-wave, red-sensitive) cones. Reds appear darker and are confused with greens.
Second most common type
Tritanopia
~0.01% of peopleMissing or non-functional S (short-wave, blue-sensitive) cones. Blues and yellows are difficult to distinguish.
Rare, affects both sexes equally
Achromatopsia
~0.003% of peopleComplete absence of cone function. Only brightness (luminance) is perceived — no hue or saturation information.
Extremely rare; design for this ensures strong luminance contrast
Test a full palette
Paste up to 8 hex codes to see how your entire palette reads under each deficiency type.
Designing for color blindness
Don't rely on color alone
Use shape, pattern, or text labels alongside color to convey information. Charts and status indicators should never rely solely on hue.
Prioritize luminance contrast
Strong light-dark contrast is perceivable by everyone. Even full achromatopsia preserves luminance — so a high-contrast palette is always accessible.
Test the critical pairs
Red/green pairs are the most commonly confused. For data visualization, prefer blue/orange or purple/yellow combinations that remain distinct under deuteranopia.